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Finding the Fourth Proportional to 519,028.42, 716,280.05 and 289,605.74

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Solution

The fourth proportional to 519,028.42, 716,280.05 and 289,605.74 is: 399,667.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,028.42 : 716,280.05 = 289,605.74 : x
  2. Step 2: Convert to fraction form
    519,028.42/716,280.05 = 289,605.74/x
  3. Step 3: Cross multiply
    519,028.42x = 716,280.05 × 289,605.74
  4. Step 4: Simplify right side
    519,028.42x = 207,438,813,927.49
  5. Step 5: Solve for x
    x = 207,438,813,927.49/519,028.42
  6. Step 6: Final answer
    x = 399,667.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.